JEE Main & Advanced Physics Ray Optics Question Bank Refraction at Curved Surface

  • question_answer
    If the focal length of a double convex lens for red light is \[{{f}_{R}},\] its focal length for the violet light is [EAMCET 2005]

    A)            \[{{f}_{R}}\]                          

    B)            Greater than \[{{f}_{R}}\]                                                               

    C)            Less than \[{{f}_{R}}\]      

    D)            \[2{{f}_{R}}\]                       

    Correct Answer: C

    Solution :

               \[f\propto \frac{1}{\mu -1}\] and \[\mu \propto \frac{1}{\lambda }\].


You need to login to perform this action.
You will be redirected in 3 sec spinner